jorisvandenbossche opened a new issue, #39740:
URL: https://github.com/apache/arrow/issues/39740
Example with latest pyarrow:
```
>>> import pyarrow as pa
>>> pa.__version__
Out[30]: '15.0.0.dev436+gac50918a6.d20240117'
>>> import pyarrow.compute as pc
>>> arr = pa.array([pa.MonthDayNano((1, 1, 1)), pa.MonthDayNano((2, 2, 2))])
>>> arr
<pyarrow.lib.MonthDayNanoIntervalArray object at 0x7f8e89147220>
[
1M1d1ns,
2M2d2ns
]
>>> pc.filter(arr, pa.array([True, False]))
Out[36]:
<pyarrow.lib.MonthDayNanoIntervalArray object at 0x7f8e89e24580>
[
3M0d0ns # <-- this value didn't even exist in the original array
]
>>> arr = pa.array([pa.MonthDayNano((1, 1, 1)), None])
>>> arr
<pyarrow.lib.MonthDayNanoIntervalArray object at 0x7f8e89e24820>
[
1M1d1ns,
null
]
>>> pc.filter(arr, pa.array([True, False]))
<pyarrow.lib.MonthDayNanoIntervalArray object at 0x7f8e88e4eda0>
[
null # <-- this should have selected the first element of the array, but
returning null instead
]
```
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